title: THz-wave sensing via pump and signal wave detection interacted with evanescent THz waves.
abstract: We report a novel sensing technique that uses an evanescent terahertz (THz) wave, without detecting the THz wave directly. When a THz wave generated by Cherenkov phase matching via difference frequency generation undergoes total internal reflection, the evanescent THz wave is subject to a phase change and an amplitude decrease. The reflected THz wave, under the influence of the sample, interferes with the propagating THz wave and the changing electric field of the THz wave interacts with the electric field of the pump waves. We demonstrate a sensing technique for detecting changes in the electric field of near-infrared light, transcribed from changes in the electric field of a THz wave.
authors.forename: Takuya
authors.initials: T
authors.lastname: Akiba
authors.forename: Naoya
authors.initials: N
authors.lastname: Kaneko
authors.forename: Koji
authors.initials: K
authors.lastname: Suizu
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Miyamoto
authors.forename: Takashige
authors.initials: T
authors.lastname: Omatsu